Catios + Cat Flap Fever: The Perfect Match for Safer, Happier Cats

If you’re reading this, chances are you already know the joy of sharing your home with a cat. They’re curious, playful, sometimes stubborn little companions—and like most pet parents, you probably want to give them the best life possible. For many cat owners, that means finding a way to safely let their cats enjoy the outdoors without the risks that come with free roaming.

That’s where catios (cat patios or enclosed outdoor spaces) come in—and where Cat Flap Fever’s custom cat window inserts shine. A huge majority of our customers install our inserts specifically for catio access. Together, they’re the ultimate combo for keeping cats safe, giving them freedom, and making life easier for humans, too.

In this blog, we’ll dive into why catios are such a game-changer, how our inserts work seamlessly with them, and why this pairing is one of the smartest choices you can make for your pets (and your home).

Why Catios Have Become So Popular

Cats are natural explorers. They love to sniff, climb, chase, and lounge in sunny spots. But outdoor dangers—cars, predators, diseases, and even unfriendly neighbors—make letting them roam free risky. Catios give you the best of both worlds:

• Fresh air and sunshine for your cat without the fear of them wandering off.

• Peace of mind for you knowing they’re safe from traffic, toxins, or other animals.

• A healthier, happier pet because they get exercise and mental stimulation.

Whether it’s a small “window box” catio that extends from your home or a large freestanding structure, catios create a safe environment where your cat can enjoy being outside year-round.

Catios + Cat Window Inserts = A Perfect Pairing

Here’s the fun part: building a catio is only half the solution. You still need a convenient, safe way for your cat to get in and out of it. That’s where Cat Flap Fever’s custom cat window inserts come in.

Instead of cutting a hole in your wall or constantly opening the back door, our inserts provide an easy, custom-fitted access point for your cat. Most of our customers use them exactly this way—to connect their home to a catio or enclosed outdoor space.

It’s the kind of setup that makes life easier for everyone:

• Cats get independence. They can come and go safely between the catio and the house.

• Humans get convenience. No more being on “door duty” every time your cat wants in or out.

• Homes stay comfortable. Our inserts are designed to keep weather out while letting pets in.

Built for Comfort: No Drafts, No Worries

One of the biggest concerns homeowners have about pet doors is energy efficiency. After all, no one wants their heating or cooling bill to skyrocket because of a poorly designed flap.

That’s why we’re proud to say Cat Flap Fever’s inserts were originally designed in the cold Chicago winters. If they can hold up there, they can hold up anywhere. Our inserts include:

• Brush weatherstripping around the swinging flap to keep drafts out.

• Foam weatherstripping around the entire insert for a snug fit in your window track.

• Durable materials (PVC or Plexiglass) that stand up to both winter chills and summer heat.

The result? A pet access point that doesn’t compromise your home’s comfort. Whether it’s freezing outside or blazing hot, your indoor climate stays cozy.

Safety First: Why Our Inserts Are Designed for Peace of Mind

The whole idea behind Cat Flap Fever started with one mission: give cats safe, controlled access outdoors.

We know that even the best-built catios can’t do their job if your cat can’t easily get back inside. That’s why our inserts are built for safety and reliability.

• Secure fit means your insert won’t wobble or shift, no matter how often it’s used.

• Locking flap options give you control when you need it—like keeping your cat in at night.

• Custom sizing ensures the flap is big enough for your pet but not oversized in a way that compromises safety.

With Cat Flap Fever, you can feel good knowing your pets can enjoy freedom without unnecessary risk.

Custom-Made for Your Home (and Your Pets)

Here’s what really sets Cat Flap Fever apart: every insert is made to order.

We don’t believe in “one size fits all” because, let’s be real—your windows aren’t like everyone else’s. Each insert is cut to fit your exact window track, whether you’ve got a horizontal slider or a vertical window.

And because pets come in all shapes and sizes, we offer different flap sizes too. Smaller cats love the standard sizes, but we also have larger flaps that work great for:

• Big cat breeds like Maine Coons, Ragdolls, and Savannahs.

• Multi-pet households where small dogs share the space.

• Homes that want a bit more flexibility for different animals.

No matter your setup, we’ll build an insert that fits both your home and your pets perfectly.

Making Life Easier for Pet Parents

If you’ve ever had a cat meowing at the door (and then immediately meowing again two minutes later), you know the struggle. Cats have a way of wanting in and out on their schedule—not yours.

With a Cat Flap Fever insert connected to your catio, you can finally stop playing doorman. Your cat gets to decide when it’s time for sunbathing, birdwatching, or nap-time inside. You get more peace, less interruption, and the satisfaction of knowing your pet is happy.

It’s convenience that pays off every single day.

Eco-Friendly and Built to Last

We also know pet parents care about the planet. That’s why all our inserts are made from recycled, sustainable, and non-toxic materials.

• PVC or Plexiglass panels are durable and weather-resistant.

• No-tools installation means you can set it up or move it easily without damaging your home.

• Handcrafted in the U.S. for quality and reliability.

This isn’t a throwaway product—it’s something designed to last, season after season, and keep both your cats and your home safe.

Why Cat Flap Fever Works So Well with Catios

Let’s bring it all together. Catios are incredible for giving your pets a healthier, safer lifestyle. But for them to really work, you need an access solution that’s just as safe, reliable, and convenient.

That’s why Cat Flap Fever and catios are such a perfect match:

• Most of our customers use them this way. Our inserts are designed with catios in mind.

• They’re safe. Cats can always come home when they need to.

• They’re convenient. You don’t have to open the door 20 times a day.

• They’re customized. Every insert is built for your unique window and your unique pets.

• They’re comfortable. Cold winters, hot summers—your home stays cozy either way.

For cat parents who want the best for their furry friends, this combo really is the ultimate solution.

Give Your Cat the Best of Both Worlds

At the end of the day, our pets are family. We want them to be safe, happy, and comfortable—and we also want our homes to stay just as cozy and convenient as they should be.

Catios give your cat a safe outdoor paradise. Cat Flap Fever inserts give them the access they need to enjoy it on their terms. Put them together, and you’ve got one of the best upgrades you can make for your pet’s quality of life (and your own).

If you’re ready to create a safer, happier home for your cats, check out our custom cat window inserts at Cat Flap Fever. Your pets will thank you every time they head out for a sun-soaked lounge in the catio—or come inside for a cozy nap on your bed.